Control apparatus for an internal combustion engine

Details Control apparatus for an internal combustion engine Control apparatus for an internal combustion engine

2011-03-15

2011-03-15

Kwon, John T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S703000

Reexamination Certificate

active

07908073

ABSTRACT:
A control apparatus for an internal combustion engine is provided which, even when a starting time of an alcohol concentration change varies, can accurately detect a starting time of an alcohol concentration estimation, and set a concentration estimation time matched to the behavior of the concentration change after determination of the start of the concentration change. An air fuel ratio correction amount calculation unit calculates an air fuel ratio correction amount based on an air fuel ratio detected by a sensor. An estimation permission determination unit determines that a starting condition for concentration estimation holds, when the correction amount becomes out of a predetermined range, and sets a permission time for concentration estimation in accordance with an accumulated amount of fuel injected after the starting condition for concentration estimation holds. A concentration estimation unit calculates an estimated concentration value based on the correction amount during permission of the concentration estimation.

REFERENCES:
patent: 6941936 (2005-09-01), Yasui et al.
patent: 7089920 (2006-08-01), Nakoji et al.
patent: 7159623 (2007-01-01), Carr et al.
patent: 7162862 (2007-01-01), Nagai et al.
patent: 7171960 (2007-02-01), Hagari
patent: 7650874 (2010-01-01), Takubo
patent: 7654252 (2010-02-01), Kato et al.
patent: 2005/0139491 (2005-06-01), Ohkuma
patent: 2010/0031941 (2010-02-01), Hokuto
patent: 2010/0077729 (2010-04-01), Endo
patent: 03-185349 (1991-08-01), None
patent: 06-093908 (1994-04-01), None
patent: 2003-120363 (2003-04-01), None
patent: 2004-278449 (2004-10-01), None
patent: 2004-285972 (2004-10-01), None
patent: 2008-019830 (2008-01-01), None

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